Telephone system



0. CESAREO TELEPHONE SYSTEM Jan. 13, 1931.

Filed Sept. 26, 1929 /NVN7'0R URFEB GESAREo Q ATTOR/Vf) responsive, to [registration current is pro-'- vided to connect the line wires'jfin @m'ultiplel 'tothe "registration magnet whereby a line loop ofgreatly increasedfresistance over that 1 P f Patented Jae/1s; '1 931 J' V f,

oRrEo- CESAREO, or nnqLnwoonf wuw JERSEY'QASSIGNQR- O BELL; TELEPHONE:

. LABORATORIES, INCORPORATED, OF NEW YQRK,]N.Y.,Q A CORPORATION. or. imwf. 1

' *riiruriaoi mj sis'iuiivr a Application filed September 26, 1929 Seri al No 395,228.

This invention relates'to telephone sy s- V lductor GQC'Ontacts 9 and '10 to the Winding ofmagnet' l and in parallel therewith over;

the lower contacts of key"7,' conductor 8, r windin -11' ofthe induction eoil, cont act 12 v terlt to the" f tems 1 and particularly to substation circuits 1I1VOlV1ng I'6g1StIat10I1 or the collect on and return ofcoins. I

, Iuaccordaiice with this invention a means ordinarily used maynow be'ern ployedi Specifically this means'may bejin the; i'foruiof a sensitive relay which, upon energizati o'il j line vvires together at;

Will 7 connect the'two the substation, i

ingi'use of the substation for talking purpos a tral oflice is shoWn'W-ith only the connection of a register key indicated at'thatpoint,v f

Dfthe armature of a registenmag net 4. Other equivalent arrangements such as; a

30 manually controlled register may be used.

in the energization ofrelay 5. I arrangement ls"deslg'ned for use on-long v 'ductor 16' tofalso'energize the magnet' 4'.

VVhenthe contacts-2 and 3 have been closed together "the magnet a "is" connected a through the Winding of relay 5 tolconductor 6 only. If undertheseconditions the 0p-. erator at the central ofiice should operate 1 theregister, key 7 she 'Will thereby connect 'battery'to conductor 6 and this will result lines insuflicient current will flow over'c'ontors 6 and S feithe'r with or. Without there:

' Another feature o of-the 'invention is a] meansto render th s relay ineffective dur- At" the substation Wh e in1a coin lilis ,deposited it causes a c0ntact12 to mechanically- I lock toa grounded contact 3 under control nected 'over' the'upper contacts of key 7, con; 7 y

hookswitch 13,' and ftransmi winding of niagn'etJ Thusf registration current is connected to the windlng of magnet 4 over llne conduc x -x ceiver on its hook. lVhatQ scla1med'1s nals for connectin :lel to'sai'd register magnet. o

' l. In, a telephone substation set, lineter-"Qf ,f minals a' registermagnet and a relay respons'ive lto'currentiover one oi said termisaid terminalsinfparal-f '2. In a telephone substat on 'set liiie-ter;

n in'als, "ahookswitch; a. register magnet, a" relay, means controlled by sald hooksw'ltch in one positionior shOrt-circuiting said re- V v layand for. connecting said terminals in parallelftosaidregister magnet, and means controlled by said hookswitch in another 'posi-l tion for rendering saidf'relay IQSPOIlSiVtO current over one ofsaid'terminals, said'reao i lay upon responseconnectingsaid terminalsi in parallel to said register magnet.

" a In Witness whereof, I hereunto subscribe my name this 25th day of-Septemberyl929;

Since this 1 r Howe'ver, upon'the'ienergization of relay '5 V 7 conductor 8 willbbe connected in 'parallel 4' "with conductor 6 at both ends of the loop 2 

